There is a lot of information about bonding in the special section further up on this forum. Is Peter Pan neutered? Is she neutered? It makes bonding much easier if they have both been neutered for a few weeks at least.
You have to let them meet on neutral territory, e.g. in a dog crate or indoor cage, but you also have to be able to separate them, if they start fighting. Indoors is much easier, as you will have to give them a few days to make friends, sometimes it works quickly, sometimes it doesn't. You can't leave them alone during the night, as they might start fighting and then you find two injured bunnies in the morning.
Alternatively you could ask a rescue or forum member in your area to bond them for you for a small donation. And clean her hutch in the meantime to remove her smell, so that she doesn't see it as her territory any more. Where did you get the bunnies from?